Fixed vncport VM tag

cloudcontrol/node/hypervisor/domains/vm_tags.py

@@ -147,7 +147,7 @@ def vncport(dom):
     try:
         port = et.ElementTree().parse(
             StringIO(dom.lv_dom.XMLDesc(0))
-        ).find('devices/graphics').get('port')
+        ).find('devices/graphics[@type="vnc"]').get('port')
     except Exception:
         logger.exception('VNCPort')
         raise